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            <blockquote>
<p>Centos配置Git环境</p>
</blockquote>
<h4 id="安装步骤"><a href="#安装步骤" class="headerlink" title="安装步骤"></a>安装步骤</h4><p>1、yum 安装git</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">#yum install git</span><br></pre></td></tr></table></figure>
<p>2、安装成功</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">#git --version</span><br><span class="line"></span><br><span class="line">git version 1.7.1</span><br></pre></td></tr></table></figure>
<p>3、卸载git</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">#yum remove git</span><br></pre></td></tr></table></figure>
<h4 id="使用git-clone下载github上的资源"><a href="#使用git-clone下载github上的资源" class="headerlink" title="使用git clone下载github上的资源"></a>使用git clone下载github上的资源</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line">#git clone https://github.com/pingcap/tidb-docker-compose.git</span><br><span class="line"></span><br><span class="line">Cloning into &apos;tidb-docker-compose&apos;...</span><br><span class="line">remote: Enumerating objects: 14, done.</span><br><span class="line">remote: Counting objects: 100% (14/14), done.</span><br><span class="line">remote: Compressing objects: 100% (13/13), done.</span><br><span class="line">remote: Total 437 (delta 0), reused 11 (delta 0), pack-reused 423</span><br><span class="line">Receiving objects: 100% (437/437), 252.88 KiB | 63.00 KiB/s, done.</span><br><span class="line">Resolving deltas: 100% (188/188), done.</span><br></pre></td></tr></table></figure>
<p>问题：如果出现提示如下，说明curl,nss版本低的原因，需要更新nss,curl。</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">#git clone https://github.com/pingcap/tidb-docker-compose.git</span><br><span class="line">Cloning into &apos;tidb-docker-compose&apos;...</span><br><span class="line">fatal: unable to access &apos;https://github.com/pingcap/tidb-docker-compose.git/&apos;: Peer reports incompatible or unsupported protocol version.</span><br></pre></td></tr></table></figure>
<p>更新nss、curl</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">#yum update nss curl</span><br></pre></td></tr></table></figure>

          
        
      
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            <blockquote>
<p>Zookeeper客户端zkServer、zkCli命令详解</p>
</blockquote>
<h4 id="zkServer客户端"><a href="#zkServer客户端" class="headerlink" title="zkServer客户端"></a>zkServer客户端</h4><ul>
<li>1、查看zk服务器状态</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">./zkServer.sh status</span><br><span class="line"></span><br><span class="line">JMX enabled by default</span><br><span class="line">Using config: /usr/local/zookeeper-server1/bin/../conf/zoo.cfg</span><br><span class="line">Mode: leader</span><br></pre></td></tr></table></figure>
<ul>
<li>2、启动/关闭zk服务器</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">./zkServer.sh start </span><br><span class="line">./zkServer.sh stop</span><br><span class="line"></span><br><span class="line">#可以指定conf </span><br><span class="line">./zkServer.sh start ../conf/zoo_1.cfg</span><br></pre></td></tr></table></figure>
<ul>
<li>3、查看 zkServer.sh 帮助信息</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">./zkServer.sh help</span><br><span class="line">ZooKeeper JMX enabled by default</span><br><span class="line">Using config: /bigdata/zookeeper-3.4.10/bin/../conf/zoo.cfg</span><br><span class="line">Usage: ./zkServer.sh &#123;start|start-foreground|stop|restart|status|upgrade|print-cmd&#125;</span><br></pre></td></tr></table></figure>
<h4 id="zkCli客户端"><a href="#zkCli客户端" class="headerlink" title="zkCli客户端"></a>zkCli客户端</h4><ul>
<li>1、查看 zkCli.sh 帮助信息</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br></pre></td><td class="code"><pre><span class="line">./zkCli.sh help</span><br><span class="line"></span><br><span class="line">ZooKeeper -server host:port cmd args</span><br><span class="line">	stat path [watch]</span><br><span class="line">	set path data [version]</span><br><span class="line">	ls path [watch]</span><br><span class="line">	delquota [-n|-b] path</span><br><span class="line">	ls2 path [watch]</span><br><span class="line">	setAcl path acl</span><br><span class="line">	setquota -n|-b val path</span><br><span class="line">	history</span><br><span class="line">	redo cmdno</span><br><span class="line">	printwatches on|off</span><br><span class="line">	delete path [version]</span><br><span class="line">	sync path</span><br><span class="line">	listquota path</span><br><span class="line">	rmr path</span><br><span class="line">	get path [watch]</span><br><span class="line">	create [-s] [-e] path data acl</span><br><span class="line">	addauth scheme auth</span><br><span class="line">	quit</span><br><span class="line">	getAcl path</span><br><span class="line">	close</span><br><span class="line">	connect host:port</span><br></pre></td></tr></table></figure>
<ul>
<li>2、连接zookeeper</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">连接本机zookeeper服务</span><br><span class="line">./zkCli.sh</span><br><span class="line"></span><br><span class="line">连接远程zookeeper服务，跟上参数：</span><br><span class="line">./zkCli.sh -server ip:port</span><br></pre></td></tr></table></figure>
<ul>
<li>3、创建节点</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line">create [-s] [-e] path data acl</span><br><span class="line"></span><br><span class="line">-s 表示是顺序节点</span><br><span class="line">-e 标识是临时节点</span><br><span class="line">path 节点路径</span><br><span class="line">data 节点数据</span><br><span class="line">acl 节点权限</span><br><span class="line"></span><br><span class="line">注：临时节点在客户端结束与服务器的会话后，自动消失</span><br></pre></td></tr></table></figure>
<ul>
<li>4、修改节点的数据</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">set path data [version] </span><br><span class="line">注：修改当前节点的数据内容 如果指定版本，需要和当前节点的数据版本一致</span><br></pre></td></tr></table></figure>
<ul>
<li>5、删除指定路径的节点</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">delete path [version]</span><br><span class="line">注： 删除指定路径的节点 如果有子节点要先删除子节点</span><br><span class="line"></span><br><span class="line">rmr path </span><br><span class="line">注： 删除当前路径节点及其所有子节点</span><br></pre></td></tr></table></figure>
<ul>
<li>6、列出节点</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line">ls path [watch]</span><br><span class="line">ls2 path [watch]</span><br><span class="line"></span><br><span class="line">注：[watch] 添加一个 watch（监视器），如果该节点发生变化，watch 可以使客户端得到通知。</span><br><span class="line">watch 只能被触发一次。如果要一直获得znode的创建和删除的通知，那么就需要不断的在znode上</span><br><span class="line">开启观察模式。如果在该 path 下创建节点，会产生 NodeChildrenChanged 事件；如果在该 path</span><br><span class="line">下删除节点，会产生 NodeDeleted 事件。</span><br><span class="line"></span><br><span class="line">使用 ls2 命令来查看某个目录包含的所有文件，与 ls 不同的是它查看到time、version等信息</span><br></pre></td></tr></table></figure>
<ul>
<li>7、获取节点信息</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br></pre></td><td class="code"><pre><span class="line">get path [watch]</span><br><span class="line"></span><br><span class="line">注：[watch] 添加一个 watch（监视器），如果节点内容发生改变，会产生 NodeDataChanged 事件；如果删除节点，会产生 NodeDeleted 事件。</span><br><span class="line"></span><br><span class="line">[zk: localhost:2181(CONNECTED) 4] get /mynode</span><br><span class="line">hello</span><br><span class="line">cZxid = 0x4e8</span><br><span class="line">ctime = Mon Apr 02 17:25:29 CST 2018</span><br><span class="line">mZxid = 0x4e8</span><br><span class="line">mtime = Mon Apr 02 17:25:29 CST 2018</span><br><span class="line">pZxid = 0x4e8</span><br><span class="line">cversion = 0</span><br><span class="line">dataVersion = 0</span><br><span class="line">aclVersion = 0</span><br><span class="line">ephemeralOwner = 0x0</span><br><span class="line">dataLength = 5</span><br><span class="line">numChildren = 0</span><br><span class="line"></span><br><span class="line">每一个对znode树的更新操作，都会被赋予一个全局唯一的ID，我们称之为zxid（ZooKeeper Transaction ID）。</span><br><span class="line">更新操作的ID按照发生的时间顺序升序排序。例如，z1大于z2，那么z1的操作就早于z2操作。</span><br><span class="line"></span><br><span class="line">每个 znode 的状态信息包含以下内容：</span><br><span class="line"></span><br><span class="line">czxid，创建（create）该 znode 的 zxid</span><br><span class="line">mzxid，最后一次修改（modify）该 znode 的 zxid</span><br><span class="line">pzxid，最后一次修改该 znode 子节点的 zxid</span><br><span class="line">ctime，创建该 znode 的时间</span><br><span class="line">mtime，最后一次修改该 znode 的时间</span><br><span class="line">dataVersion，该节点内容的版本，每次修改内容，版本都会增加</span><br><span class="line">cversion，该节点子节点的版本</span><br><span class="line">aclVersion，该节点的 ACL 版本</span><br><span class="line">ephemeralOwner，如果该节点是临时节点（ephemeral node），会列出该节点所在客户端的 session id；如果不是临时节点，该值为 0</span><br><span class="line">dataLength，该节点存储的数据长度</span><br><span class="line">numChildren，该节点子节点的个数</span><br></pre></td></tr></table></figure>
<ul>
<li>8、检查状态 stat</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">stat path [watch]</span><br><span class="line"></span><br><span class="line">注：[watch] 添加一个 watch（监视器），如果节点内容发生改变，会产生 NodeDataChanged 事件；如果删除节点，会产生 NodeDeleted 事件。</span><br><span class="line"></span><br><span class="line">与 get 的区别是，不回列出 znode 的值。</span><br></pre></td></tr></table></figure>
<ul>
<li>9、打开和关闭连接</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">打开连接 connect 指定 host:port 可以连接远程的 zk 服务。缺省的时候，会连接本地的 2181 端口。</span><br><span class="line">connect host:port</span><br><span class="line"></span><br><span class="line">关闭连接 close</span><br><span class="line">close</span><br></pre></td></tr></table></figure>
<ul>
<li>10、退出连接 quit</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">quit</span><br><span class="line">直接退出当前的 zkCli 命令行。</span><br></pre></td></tr></table></figure>
<ul>
<li>11、ACL命令</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br></pre></td><td class="code"><pre><span class="line">一个znode中不仅包含了存储的数据，还有 ACL（Access Control List）。</span><br><span class="line">znode的创建时，可以给它设置一个ACL（Access Control List），来决定谁可以对znode做哪些操作。</span><br><span class="line"></span><br><span class="line">ACL 具有以下特点：</span><br><span class="line"></span><br><span class="line">ZooKeeper的权限控制是基于每个znode节点的，需要对每个节点设置权限</span><br><span class="line">每个znode支持设置多种权限控制方案和多个权限</span><br><span class="line">子节点不会继承父节点的权限，客户端无权访问某节点，但可能可以访问它的子节点</span><br><span class="line">所以任何一个客户端都可以通过exists 操作来获得任何znode的状态，从而得知znode是否真的存在。 </span><br><span class="line"></span><br><span class="line">ACL Permissions：</span><br><span class="line"></span><br><span class="line">ACL 权限	ACL 简写	允许的操作</span><br><span class="line">CREATE	c	创建子节点</span><br><span class="line">READ	r	获取节点的数据和它的子节点</span><br><span class="line">WRITE	w	设置节点的数据</span><br><span class="line">DELETE	d	删除子节点 （仅下一级节点）</span><br><span class="line">ADMIN	a	设置 ACL 权限 </span><br><span class="line"></span><br><span class="line">权限相关命令：</span><br><span class="line"></span><br><span class="line">命令	语法		描述</span><br><span class="line">getAcl	getAcl path	读取ACL权限</span><br><span class="line">setAcl	setAcl path acl	设置ACL权限</span><br><span class="line">addauth	addauth scheme auth	添加认证用户</span><br><span class="line">create	create [-s] [-e] path data acl	创建节点时指明 ACL 权限 </span><br><span class="line"></span><br><span class="line">ACL Schemes：</span><br><span class="line">ZooKeeper内置了一些权限控制方案，可以用以下方案为每个节点设置权限：</span><br><span class="line"></span><br><span class="line">方案	描述</span><br><span class="line">world	只有一个用户：anyone，代表所有人（默认）</span><br><span class="line">ip	使用IP地址认证</span><br><span class="line">auth	使用已添加认证的用户认证</span><br><span class="line">digest	使用“用户名:密码”方式认证 </span><br><span class="line"></span><br><span class="line">1.world 方案</span><br><span class="line">设置方式：setAcl &lt;path&gt; world:anyone:&lt;acl&gt;</span><br><span class="line"></span><br><span class="line">注：默认情况下时 world 方法，任何人有所有权限：</span><br><span class="line"></span><br><span class="line">2.IP 方案</span><br><span class="line">设置方式：setAcl &lt;path&gt; ip:&lt;ip&gt;:&lt;acl&gt;</span><br><span class="line"></span><br><span class="line">注：&lt;ip&gt;：可以是具体IP也可以是IP/bit格式，即IP转换为二进制，匹配前bit位，如192.168.0.0/16匹配192.168.*.*</span><br><span class="line"></span><br><span class="line">3.auth 方案</span><br><span class="line"></span><br><span class="line">设置方式</span><br><span class="line">addauth digest &lt;user&gt;:&lt;password&gt; #添加认证用户</span><br><span class="line">setAcl &lt;path&gt; auth:&lt;user&gt;:&lt;acl&gt;</span><br><span class="line"></span><br><span class="line">4.digest 方案</span><br><span class="line"></span><br><span class="line">设置方式</span><br><span class="line">setAcl &lt;path&gt; digest:&lt;user&gt;:&lt;password&gt;:&lt;acl&gt;</span><br><span class="line"></span><br><span class="line">这里的密码是经过SHA1及BASE64处理的密文，在SHELL中可以通过以下命令计算：</span><br><span class="line">echo -n &lt;user&gt;:&lt;password&gt; | openssl dgst -binary -sha1 | openssl base64</span><br><span class="line">先来算一个密文密码：</span><br><span class="line">echo -n admin:admin | openssl dgst -binary -sha1 | openssl base64</span><br><span class="line">x1nq8J5GOJVPY6zgzhtTtA9izLc=</span><br><span class="line"></span><br><span class="line">5.创建节点时指定 ACL</span><br><span class="line"></span><br><span class="line">create /mynode hello auth:admin:cdrwa</span><br></pre></td></tr></table></figure>
<ul>
<li>12、其他命令</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">历史记录 history</span><br><span class="line">history </span><br><span class="line">注：列出最近的10条历史记录</span><br><span class="line"></span><br><span class="line">重复之前的命令 redo</span><br><span class="line">redo cmdno </span><br><span class="line">根据 cmdno 重复之前的命令，cmdno 就是方括号里面最后的数字，每次执行命令都会自增。</span><br></pre></td></tr></table></figure>
<h4 id="使用ZooKeeper四字命令"><a href="#使用ZooKeeper四字命令" class="headerlink" title="使用ZooKeeper四字命令"></a>使用ZooKeeper四字命令</h4><table>
<thead>
<tr>
<th>ZooKeeper四字命令</th>
<th>功能描述</th>
</tr>
</thead>
<tbody>
<tr>
<td>conf</td>
<td>输出相关服务配置的详细信息。</td>
</tr>
<tr>
<td>cons</td>
<td>列出所有连接到服务器的客户端的完全的连接 / 会话的详细信息。包括“接受 / 发送”的包数量、会话 id 、操作延迟、最后的操作执行等等信息。</td>
</tr>
<tr>
<td>dump</td>
<td>列出未经处理的会话和临时节点。</td>
</tr>
<tr>
<td>envi</td>
<td>输出关于服务环境的详细信息（区别于 conf 命令）。</td>
</tr>
<tr>
<td>reqs</td>
<td>列出未经处理的请求</td>
</tr>
<tr>
<td>ruok</td>
<td>测试服务是否处于正确状态。如果确实如此，那么服务返回“imok ”，否则不做任何相应。</td>
</tr>
<tr>
<td>stat</td>
<td>输出关于性能和连接的客户端的列表。</td>
</tr>
<tr>
<td>wchs</td>
<td>列出服务器 watch 的详细信息。</td>
</tr>
<tr>
<td>wchc</td>
<td>通过 session 列出服务器 watch 的详细信息，它的输出是一个与watch 相关的会话的列表。</td>
</tr>
<tr>
<td>wchp</td>
<td>通过路径列出服务器 watch 的详细信息。它输出一个与 session相关的路径。</td>
</tr>
</tbody>
</table>
<p>参考链接：<br><a href="https://blog.csdn.net/zhang123456456/article/details/78243658" target="_blank" rel="noopener">https://blog.csdn.net/zhang123456456/article/details/78243658</a><br><a href="https://blog.csdn.net/feixiang2039/article/details/79810102" target="_blank" rel="noopener">https://blog.csdn.net/feixiang2039/article/details/79810102</a></p>

          
        
      
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            <blockquote>
<p>一、Zookeeper简介</p>
</blockquote>
<h5 id="简介"><a href="#简介" class="headerlink" title="简介"></a>简介</h5><p>ZooKeeper是一种分布式协调服务，用于管理大型主机。在分布式环境中协调和管理服务是一个复杂的过程。ZooKeeper通过其简单的架构和API解决了这个问题。ZooKeeper允许开发人员专注于核心应用程序逻辑，而不必担心应用程序的分布式特性。ZooKeeper框架最初是在“Yahoo!”上构建的，用于以简单而稳健的方式访问他们的应用程序。 后来，Apache ZooKeeper成为Hadoop，HBase和其他分布式框架使用的有组织服务的标准。 例如，Apache HBase使用ZooKeeper跟踪分布式数据的状态。</p>
<p>Zookeeper是一个分布式协调服务；就是为用户的分布式应用程序提供协调服务</p>
<ul>
<li><p>1、为别的分布式程序服务的(比如服务管理、心跳检查、配置信息管理)</p>
</li>
<li><p>2、本身就是一个分布式程序（只要有半数以上节点存活，zk就能正常服务）</p>
</li>
<li><p>3、提供的服务涵盖：主从协调、服务器节点动态上下线、统一配置管理、分布式共享锁、统一名称服务……</p>
</li>
<li><p>4、虽然说可以提供各种服务，但是zookeeper在底层其实只提供了两个功能：</p>
<ul>
<li>管理(存储，读取)用户程序提交的数据；</li>
<li>并为用户程序提供数据节点监听服务；</li>
</ul>
</li>
</ul>
<p>官网：<a href="https://zookeeper.apache.org/" target="_blank" rel="noopener">https://zookeeper.apache.org/</a></p>
<blockquote>
<p>二、zookeeper伪分布式搭建</p>
</blockquote>
<h5 id="环境准备"><a href="#环境准备" class="headerlink" title="环境准备"></a>环境准备</h5><p>伪分布式集群就是在一台机器部署多个zk应用，部署之前服务器需要有jdk环境 java -version可以显示相关java信息才可以进行zookeeper搭建，<a href="https://cnsyear.com/2019/06/26/Centos安装配置JDK环境/">jdk安装&gt;&gt;传送门</a></p>
<h5 id="安装步骤"><a href="#安装步骤" class="headerlink" title="安装步骤"></a>安装步骤</h5><ul>
<li>下载好zookeeper-3.4.9.tar.gz <a href="https://www.apache.org/dyn/closer.cgi/zookeeper/" target="_blank" rel="noopener">下载地址</a></li>
<li>然后解压tar -zxvf zookeeper-3.4.9.tar.gz</li>
<li>进入zk中的conf目录下输入</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">cp zoo-sample.cfg zoo1.cfg  </span><br><span class="line">cp zoo-sample.cfg zoo2.cfg</span><br><span class="line">cp zoo-sample.cfg zoo3.cfg</span><br></pre></td></tr></table></figure>
<ul>
<li>分别对zoo1、2、3文件进行编辑</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br></pre></td><td class="code"><pre><span class="line"># The number of milliseconds of each tick</span><br><span class="line">tickTime=2000</span><br><span class="line"># The number of ticks that the initial </span><br><span class="line"># synchronization phase can take</span><br><span class="line">initLimit=10</span><br><span class="line"># The number of ticks that can pass between </span><br><span class="line"># sending a request and getting an acknowledgement</span><br><span class="line">syncLimit=5</span><br><span class="line"># the directory where the snapshot is stored.</span><br><span class="line"># do not use /tmp for storage, /tmp here is just </span><br><span class="line"># example sakes.</span><br><span class="line">#不同zoo.cfg修改自己的目录 zoo1.cfg为d_1、zoo2.cfg为d_2、zoo3.cfg为d_3</span><br><span class="line">dataDir=/apps/servers/data/d_1</span><br><span class="line">dataLogDir=/apps/servers/logs/logs_1</span><br><span class="line"># the port at which the clients will connect</span><br><span class="line">#不同zoo.cfg修改自己的端口号 zoo1.cfg端口为2181、zoo2.cfg端口为2182、zoo3.cfg端口为2183</span><br><span class="line">clientPort=2187</span><br><span class="line"># the maximum number of client connections.</span><br><span class="line"># increase this if you need to handle more clients</span><br><span class="line">#maxClientCnxns=60</span><br><span class="line">#</span><br><span class="line"># Be sure to read the maintenance section of the </span><br><span class="line"># administrator guide before turning on autopurge.</span><br><span class="line">#</span><br><span class="line"># http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance</span><br><span class="line">#</span><br><span class="line"># The number of snapshots to retain in dataDir</span><br><span class="line">#autopurge.snapRetainCount=3</span><br><span class="line"># Purge task interval in hours</span><br><span class="line"># Set to &quot;0&quot; to disable auto purge feature</span><br><span class="line">#autopurge.purgeInterval=1</span><br><span class="line">server.1=localhost:2187:2887 </span><br><span class="line">server.2=localhost:2188:2888</span><br><span class="line">server.3=localhost:2189:2889</span><br></pre></td></tr></table></figure>
<ul>
<li>修改之后分别创建data目录和日志目录,并写入myid</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">mkdir -p /apps/servers/data/d_1</span><br><span class="line">mkdir -p /apps/servers/data/d_2</span><br><span class="line">mkdir -p /apps/servers/data/d_3</span><br><span class="line"></span><br><span class="line">mkdir -p /apps/servers/logs/logs_1</span><br><span class="line">mkdir -p /apps/servers/logs/logs_1</span><br><span class="line">mkdir -p /apps/servers/logs/logs_1</span><br><span class="line"></span><br><span class="line">echo &quot;1&quot; &gt; /apps/servers/data/d_1/myid</span><br><span class="line">echo &quot;2&quot; &gt;/apps/servers/data/d_2/myid</span><br><span class="line">echo &quot;3&quot; &gt;/apps/servers/data/d_3/myid</span><br></pre></td></tr></table></figure>
<ul>
<li>进入bin目录下输入命令 分别进行启动</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">./zkServer.sh start ../conf/zoo1.cfg</span><br><span class="line">./zkServer.sh start ../conf/zoo2.cfg</span><br><span class="line">./zkServer.sh start ../conf/zoo3.cfg</span><br><span class="line"></span><br><span class="line">停止</span><br><span class="line">./zkServer.sh stop ../conf/zoo3.cfg</span><br></pre></td></tr></table></figure>
<ul>
<li>通过命令检测是否成功：</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">./zkCli.sh -server localhost:2181,localhost:2182,localhost:2183</span><br><span class="line"></span><br><span class="line">或者</span><br><span class="line"></span><br><span class="line">./zkServer.sh status</span><br><span class="line"></span><br><span class="line">或者查看jvm进程</span><br><span class="line">jps</span><br></pre></td></tr></table></figure>
<p>成功显示</p>
<p><img src="https://zj820382480.gitee.io/youdaoyun/image/QQ浏览器截图20190627230638.png" alt="image"></p>
<p><img src="https://zj820382480.gitee.io/youdaoyun/image/TIM截图20190629150642.png" alt="image"></p>
<p><img src="https://zj820382480.gitee.io/youdaoyun/image/TIM截图20190629150313.png" alt="image"></p>
<ul>
<li>至此Zookeeper搭建结束，下面开始启动Zookeeper,分别启动：如果你不想切换到Zookeeper目录启动，可以配置环境变量：</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">vim /etc/profile (修改文件)</span><br><span class="line"></span><br><span class="line">export ZOOKEEPER_HOME=/usr/local/zookeeper-3.4.13</span><br><span class="line">export PATH=$&#123;ZOOKEEPER_HOME&#125;/bin:$PATH</span><br><span class="line"></span><br><span class="line">重新编译文件：</span><br><span class="line">source /etc/profile</span><br></pre></td></tr></table></figure>
          
        
      
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            <blockquote>
<p>Linux常用命令整理</p>
</blockquote>
<h4 id="一、常用教程"><a href="#一、常用教程" class="headerlink" title="一、常用教程"></a>一、常用教程</h4><p><a href="http://man.linuxde.net/" target="_blank" rel="noopener">http://man.linuxde.net/</a></p>
<p><a href="https://linuxtools-rst.readthedocs.io/zh_CN/latest/index.html" target="_blank" rel="noopener">https://linuxtools-rst.readthedocs.io/zh_CN/latest/index.html</a></p>
<h4 id="二、Linux文件系统"><a href="#二、Linux文件系统" class="headerlink" title="二、Linux文件系统"></a>二、Linux文件系统</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line">常见目录说明：</span><br><span class="line">   /bin： 存放二进制可执行文件(ls,cat,mkdir等)，常用命令一般都在这里；</span><br><span class="line">   /etc： 存放系统管理和配置文件 /etc/profile ；</span><br><span class="line">   /home： 存放所有用户文件的根目录，是用户主目录的基点，比如用户user的主目录就是/home/user，可以用~user表示；</span><br><span class="line">   /usr： 用于存放系统应用程序；</span><br><span class="line">   /opt： 额外安装的可选应用程序包所放置的位置。一般情况下，我们可以把tomcat等都安装到这里；</span><br><span class="line">   /proc： 虚拟文件系统目录，是系统内存的映射。可直接访问这个目录来获取系统信息；</span><br><span class="line">   /root： 超级用户（系统管理员）的主目录（特权阶级o）；</span><br><span class="line">   /sbin: 存放二进制可执行文件，只有root才能访问。这里存放的是系统管理员使用的系统级别的管理命令和程序。如ifconfig等；</span><br><span class="line">   /dev： 用于存放设备文件；</span><br><span class="line">   /mnt： 系统管理员安装临时文件系统的安装点，系统提供这个目录是让用户临时挂载其他的文件系统；</span><br><span class="line">   /boot： 存放用于系统引导时使用的各种文件；</span><br><span class="line">   /lib ： 存放着和系统运行相关的库文件 ；</span><br><span class="line">   /tmp： 用于存放各种临时文件，是公用的临时文件存储点；</span><br><span class="line">   /var： 用于存放运行时需要改变数据的文件，也是某些大文件的溢出区，比方说各种服务的日志文件（系统启动日志等。）等；</span><br><span class="line">   /lost+found： 这个目录平时是空的，系统非正常关机而留下“无家可归”的文件（windows下叫什么.chk）就在这里。</span><br></pre></td></tr></table></figure>
<h4 id="三、Linux基本命令"><a href="#三、Linux基本命令" class="headerlink" title="三、Linux基本命令"></a>三、Linux基本命令</h4><h5 id="1-目录切换命令"><a href="#1-目录切换命令" class="headerlink" title="1.目录切换命令"></a>1.目录切换命令</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">cd usr： 切换到该目录下usr目录</span><br><span class="line">cd ..（或cd../）： 切换到上一层目录</span><br><span class="line">cd /： 切换到系统根目录</span><br><span class="line">cd ~： 切换到用户主目录</span><br><span class="line">cd -： 切换到上一个所在目录</span><br></pre></td></tr></table></figure>
<h5 id="2-目录的操作命令（增删改查）"><a href="#2-目录的操作命令（增删改查）" class="headerlink" title="2.目录的操作命令（增删改查）"></a>2.目录的操作命令（增删改查）</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br></pre></td><td class="code"><pre><span class="line">mkdir命令用来创建一个目录或一个级联目录。</span><br><span class="line">1.命令格式</span><br><span class="line">　　mkdir [选项] 目录名</span><br><span class="line">2.命令选项</span><br><span class="line">　　-m=mode</span><br><span class="line">　　　　为目录指定访问权限，与chmod类似。</span><br><span class="line">　　-p　　如果目录已经存在，则不会有错误提示。若父目录不存在，将会创建父目录。该选项常用于创建级联目录。</span><br><span class="line">　　-v　　为每个目录显示提示信息。</span><br><span class="line"></span><br><span class="line">ls或者ll（ll是ls -l的缩写，ll命令以看到该目录下的所有目录和文件的详细信息）：查看目录信息</span><br><span class="line">find 目录 参数： 寻找目录（查）</span><br><span class="line">示例：</span><br><span class="line">    列出当前目录及子目录下所有文件和文件夹: find .</span><br><span class="line">    在/home目录下查找以.txt结尾的文件名:find /home -name &quot;*.txt&quot;</span><br><span class="line">    同上，但忽略大小写: find /home -iname &quot;*.txt&quot;</span><br><span class="line">    当前目录及子目录下查找所有以.txt和.pdf结尾的文件:find . \( -name &quot;*.txt&quot; --name &quot;*.pdf&quot; \)或find . -name &quot;*.txt&quot; --name &quot;*.pdf&quot;</span><br><span class="line">mv 目录名称 新目录名称： 修改目录的名称（改）</span><br><span class="line">    注意：mv的语法不仅可以对目录进行重命名而且也可以对各种文件，压缩包等进行 重命名的操作。</span><br><span class="line">    mv命令用来对文件或目录重新命名，或者将文件从一个目录移到另一个目录中。</span><br><span class="line">mv 目录名称 目录的新位置： 移动目录的位置---剪切（改）</span><br><span class="line">    注意：mv语法不仅可以对目录进行剪切操作，对文件和压缩包等都可执行剪切操作。</span><br><span class="line">    另外mv与cp的结果不同，mv好像文件“搬家”，文件个数并未增加。而cp对文件进行复制，文件个数增加了。</span><br><span class="line">cp -r 目录名称 目录拷贝的目标位置： 拷贝目录（改），-r代表递归拷贝</span><br><span class="line">    注意：cp命令不仅可以拷贝目录还可以拷贝文件，压缩包等，拷贝文件和压缩包时不 用写-r递归</span><br><span class="line">rm [-rf] 目录: 删除目录（删）</span><br><span class="line">    注意：rm不仅可以删除目录，也可以删除其他文件或压缩包，为了增强大家的记忆，</span><br><span class="line">    无论删除任何目录或文件，都直接使用rm -rf 目录/文件/压缩包</span><br></pre></td></tr></table></figure>
<h5 id="3-文件的操作命令（增删改查）"><a href="#3-文件的操作命令（增删改查）" class="headerlink" title="3.文件的操作命令（增删改查）"></a>3.文件的操作命令（增删改查）</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br></pre></td><td class="code"><pre><span class="line">touch 文件名称: 文件的创建（增）</span><br><span class="line">cat /more/less/tail 文件名称 文件的查看（查）</span><br><span class="line">    cat： 只能显示最后一屏内容</span><br><span class="line">    more： 可以显示百分比，回车可以向下一行， 空格可以向下一页，q可以退出查看</span><br><span class="line">    less： 可以使用键盘上的PgUp和PgDn向上 和向下翻页，q结束查看</span><br><span class="line">    head -10 ： 查看文件的前10行，Ctrl+C结束</span><br><span class="line">    tail -10 ： 查看文件的后10行，Ctrl+C结束</span><br><span class="line">    注意：命令 tail -f 文件 可以对某个文件进行动态监控，例如tomcat的日志文件， 会随着程序的运行，日志会变化，</span><br><span class="line">    可以使用tail -f catalina-2016-11-11.log 监控 文 件的变化</span><br><span class="line"></span><br><span class="line">vim 文件： 修改文件的内容（改）</span><br><span class="line">    vim编辑器是Linux中的强大组件，是vi编辑器的加强版，vim编辑器的命令和快捷方式有很多，这里列出一些常用命令。</span><br><span class="line">    在实际开发中，使用vim编辑器主要作用就是修改配置文件和编写shell脚本，下面是一般步骤：</span><br><span class="line">    vim 文件------&gt;进入文件-----&gt;命令模式------&gt;按i进入编辑模式-----&gt;编辑文件 -------&gt;按Esc进入底行模式-----&gt;输入:wq/q! （输入wq代表写入内容并退出，即保存；输入q!代表强制退出不保存。）</span><br><span class="line">    命令模式</span><br><span class="line">        用vim 打开一个文件刚开始进入的就是命令模式，在这个模式下我们可以控制光标的移动，字符，字或者行的删除，移动复制某段区域，在该模式下可以进入插入模式也可以进入底行模式。</span><br><span class="line">    编辑模式</span><br><span class="line">        在编辑模式下才可以插入文字，按Esc进入底行模式.</span><br><span class="line">    底行模式</span><br><span class="line">        在底行模式下保存文件或者退出vim</span><br><span class="line">vim常用命令：</span><br><span class="line">    1).移动光标</span><br><span class="line">        1.vim 可以使用小写英文字母 h j k l 分别控制光标左 下 上 右移动，也可以使用箭头</span><br><span class="line">        2.Ctrl+b 屏幕往后移动一页</span><br><span class="line">        3.Ctrl+f 屏幕往前移动一页</span><br><span class="line">        4.Ctrl+u 屏幕往后移动半页</span><br><span class="line">        5.Ctrl+d 屏幕往前移动半页</span><br><span class="line">        6.Shift+g == G 移动到文章的最后</span><br><span class="line">        7.Shift+4 == $ 移动到光标所在行的行尾</span><br><span class="line">        8.Shift+6 == ^ 移动到光标所在行的行首</span><br><span class="line">        9.w 光标跳到下个字的开头</span><br><span class="line">        10.e 光标跳到下个字的字尾</span><br><span class="line">        11.b 光标回到上个字的开头</span><br><span class="line">        12.#l  例如:5l ，56l 光标移动到该行的第&apos;#&apos;个位置</span><br><span class="line">        13.gg 进入到文本的开始</span><br><span class="line">    </span><br><span class="line">    2).删除文字</span><br><span class="line">        1.x 每按一次删除光标所在位置的一个字符</span><br><span class="line">        2.#x 例子：6x 删除光标所在位置的&quot;后面&quot;(包含自己在内)6个字符</span><br><span class="line">        3.Shift+x == X 每按一次，删除光标所在位置的前一个字符</span><br><span class="line">        4.Shift+#x == #X 例子 20X 删除光标所在位置的前面20个字符</span><br><span class="line">        5.dd 删除光标所在行</span><br><span class="line">        6.#dd 例子 6dd 从光标所在行开始删除6行</span><br><span class="line">        </span><br><span class="line">    3).复制</span><br><span class="line">        1.yw 将光标所在之处到字尾的字符复制到缓冲区中</span><br><span class="line">        2.#yw 例子 6yw 复制6个字符到缓冲区</span><br><span class="line">        3.yy 复制光标所在行到缓冲区</span><br><span class="line">        4.#yy 例子 6yy 拷贝从光标所在的该行&quot;往下数&quot;6行文字</span><br><span class="line">        5.p 将缓冲区内的字符贴到光标所在位置</span><br><span class="line">        注意：所有与y有关的复制命令都必须与p配合才能完成复制粘贴功能</span><br><span class="line">        </span><br><span class="line">    4).替换</span><br><span class="line">        1.r 替换光标所在处的字符</span><br><span class="line">        2.R 替换光标所到之处的字符，知道按下Esc键为止.</span><br><span class="line">        </span><br><span class="line">    5).撤销上一次的操作</span><br><span class="line">        u 回到上一个操作，按动多次&apos;u&apos;可以执行多次回复</span><br><span class="line">        </span><br><span class="line">    6).更改</span><br><span class="line">        1.cw 更改光标所在处的字到字尾处</span><br><span class="line">        2.c#w 例子 c3w 表示更改三个字</span><br><span class="line">        </span><br><span class="line">    7).跳至指定行</span><br><span class="line">        1.Ctrl+g 列出光标所在行的行号</span><br><span class="line">        2.#G 例子 15G 表示移动光标到文章的第15行行首</span><br></pre></td></tr></table></figure>
<h5 id="4-压缩文件的操作命令"><a href="#4-压缩文件的操作命令" class="headerlink" title="4.压缩文件的操作命令"></a>4.压缩文件的操作命令</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br></pre></td><td class="code"><pre><span class="line">1).打包并压缩文件：</span><br><span class="line">    Linux中的打包文件一般是以.tar结尾的，压缩的文件一般是以.gz结尾的。</span><br><span class="line">    而一般情况下打包和压缩是一起进行的，打包并压缩后的文件的后缀名一般.tar.gz。 命令：tar -zcvf 打包压缩后的文件名 要打包压缩的文件 其中：</span><br><span class="line">    z：调用gzip压缩命令进行压缩</span><br><span class="line">    c：打包文件</span><br><span class="line">    v：显示运行过程</span><br><span class="line">    f：指定文件名</span><br><span class="line">    比如：加入test目录下有三个文件分别是 :aaa.txt bbb.txt ccc.txt,如果我们要打包test目录并指定压缩后的压缩包名称为test.tar.gz</span><br><span class="line">    可以使用命令：</span><br><span class="line">    tar -zcvf test.tar.gz aaa.txt bbb.txt ccc.txt</span><br><span class="line">    或：</span><br><span class="line">    tar -zcvf test.tar.gz /test/</span><br><span class="line">    </span><br><span class="line">2).解压压缩包：</span><br><span class="line">    命令：tar [-xvf] 压缩文件</span><br><span class="line">    其中：x：代表解压</span><br><span class="line">    示例：</span><br><span class="line">    1 将/test下的test.tar.gz解压到当前目录下可以使用命令：tar -xvf test.tar.gz</span><br><span class="line">    2 将/test下的test.tar.gz解压到根目录/usr下:tar -xvf xxx.tar.gz -C /usr（- C代表指定解压的位置）</span><br></pre></td></tr></table></figure>
<h5 id="5-Linux的权限命令"><a href="#5-Linux的权限命令" class="headerlink" title="5.Linux的权限命令"></a>5.Linux的权限命令</h5><p>操作系统中每个文件都拥有特定的权限、所属用户和所属组。权限是操作系统用来限制资源访问的机制，在Linux中权限一般分为读(readable)、写(writable)和执行(excutable)，分为三组。分别对应文件的属主(owner)，属组(group)和其他用户(other)，通过这样的机制来限制哪些用户、哪些组可以对特定的文件进行什么样的操作。</p>
<p>通过 ls -l 命令我们可以 查看某个目录下的文件或目录的权限</p>
<p><img src="https://zj820382480.gitee.io/youdaoyun/image/886199-20181208123557919-1158645021.png?111" alt="image"></p>
<p>第一列的内容的信息解释如下：</p>
<p><img src="https://zj820382480.gitee.io/youdaoyun/image/886199-20181208123613024-1899561527.png?111" alt="image"></p>
<p>下面将详细讲解文件的类型、Linux中权限以及文件有所有者、所在组、其它组具体是什么？<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br></pre></td><td class="code"><pre><span class="line">文件类型：</span><br><span class="line">   d： 代表目录</span><br><span class="line">   -： 代表文件</span><br><span class="line">   l： 代表链接（可以认为是window中的快捷方式）</span><br><span class="line"></span><br><span class="line">Linux中权限分为以下几种：</span><br><span class="line">   r：代表权限是可读，r也可以用数字4表示</span><br><span class="line">   w：代表权限是可写，w也可以用数字2表示</span><br><span class="line">   x：代表权限是可执行，x也可以用数字1表示</span><br><span class="line"></span><br><span class="line">文件和目录权限的区别：</span><br><span class="line">    对文件和目录而言，读写执行表示不同的意义。</span><br><span class="line">    对于文件：</span><br><span class="line">        权限名称    可执行操作</span><br><span class="line">        r   可以使用cat查看文件的内容</span><br><span class="line">        w   可以修改文件的内容</span><br><span class="line">        x   可以将其运行为二进制文件</span><br><span class="line">    对于目录：</span><br><span class="line">        权限名称    可执行操作</span><br><span class="line">        r   可以查看目录下列表</span><br><span class="line">        w   可以创建和删除目录下文件</span><br><span class="line">        x   可以使用cd进入目录</span><br></pre></td></tr></table></figure></p>
<p>在linux中的每个用户必须属于一个组，不能独立于组外。在linux中每个文件有所有者、所在组、其它组的概念。<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">所有者</span><br><span class="line">    一般为文件的创建者，谁创建了该文件，就天然的成为该文件的所有者，用ls ‐l命令可以看到文件的所有者 也可以使用chown 用户名 文件名来修改文件的所有者 。</span><br><span class="line">文件所在组</span><br><span class="line">    当某个用户创建了一个文件后，这个文件的所在组就是该用户所在的组 用ls ‐l命令可以看到文件的所有组 也可以使用chgrp 组名 文件名来修改文件所在的组。</span><br><span class="line">其它组</span><br><span class="line">    除开文件的所有者和所在组的用户外，系统的其它用户都是文件的其它组</span><br></pre></td></tr></table></figure></p>
<p>我们再来看看如何修改文件/目录的权限。</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">修改文件/目录的权限的命令：chmod</span><br><span class="line">    示例：修改/test下的aaa.txt的权限为属主有全部权限，属主所在的组有读写权限， 其他用户只有读的权限</span><br><span class="line">    chmod u=rwx,g=rw,o=r aaa.txt</span><br></pre></td></tr></table></figure>
<p><img src="https://zj820382480.gitee.io/youdaoyun/image/886199-20181208123631086-250897879.png?111" alt="image"></p>
<p>上述示例还可以使用数字表示：</p>
<p>chmod 764 aaa.txt</p>
<h5 id="6-Linux-用户管理"><a href="#6-Linux-用户管理" class="headerlink" title="6.Linux 用户管理"></a>6.Linux 用户管理</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">useradd 选项 用户名:添加用户账号</span><br><span class="line">userdel 选项 用户名:删除用户帐号</span><br><span class="line">usermod 选项 用户名:修改帐号</span><br><span class="line">passwd 用户名:更改或创建用户的密码</span><br><span class="line">passwd -S 用户名 :显示用户账号密码信息</span><br><span class="line">passwd -d 用户名: 清除用户密码</span><br><span class="line">su - 用户名：切换登录用户</span><br></pre></td></tr></table></figure>
<h5 id="7-Linux系统用户组的管理"><a href="#7-Linux系统用户组的管理" class="headerlink" title="7.Linux系统用户组的管理"></a>7.Linux系统用户组的管理</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">groupadd 选项 用户组 :增加一个新的用户组</span><br><span class="line">groupdel 用户组:要删除一个已有的用户组</span><br><span class="line">groupmod 选项 用户组 : 修改用户组的属性</span><br></pre></td></tr></table></figure>
<h5 id="8-其他常用命令"><a href="#8-其他常用命令" class="headerlink" title="8.其他常用命令"></a>8.其他常用命令</h5><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br></pre></td><td class="code"><pre><span class="line">  pwd： 显示当前所在位置</span><br><span class="line">   grep 要搜索的字符串 要搜索的文件 --color： 搜索命令，--color代表高亮显示</span><br><span class="line">   ps -ef/ps aux： </span><br><span class="line">    这两个命令都是查看当前系统正在运行进程，两者的区别是展示格式不同。</span><br><span class="line">    如果想要查看特定的进程可以使用这样的格式：ps aux|grep redis （查看包括redis字符串的进程）</span><br><span class="line">    注意：如果直接用ps（（Process Status））命令，会显示所有进程的状态，通常结合grep命令查看某进程的状态。</span><br><span class="line">   kill -9 进程的pid： 杀死进程（-9 表示强制终止。）</span><br><span class="line">    先用ps查找进程，然后用kill杀掉</span><br><span class="line">    </span><br><span class="line">网络通信命令</span><br><span class="line"></span><br><span class="line">查看当前系统的网卡信息：ifconfig</span><br><span class="line">查看与某台机器的连接情况：ping</span><br><span class="line">查看当前系统的端口：netstat</span><br><span class="line">an 所有的连接和端口</span><br><span class="line">tuln 查看正在监听TCP（t）和UDP（u）的端口 ，例如：netstat -tuln | grep LISTEN</span><br><span class="line">rn 查看网关 route -n</span><br><span class="line"></span><br><span class="line">ln： 创建链接文件</span><br><span class="line">  创建软链接文件：ln -s [源文件] 软连接名称 (硬链接不需-s选项)</span><br><span class="line">软链接特点：权限是所有人都可以访问，并且软连接文件指向源文件。</span><br><span class="line">软链接就像windows系统中的快捷方式一样，特点也都类似。</span><br><span class="line">硬链接：类似copy，硬链接大小和源文件一样，并且是同步更新的。</span><br><span class="line"></span><br><span class="line">shutdown： </span><br><span class="line">shutdown -h now： 指定现在立即关机；</span><br><span class="line">shutdown +5 &quot;System will shutdown after 5 minutes&quot;:指定5分钟后关机，同时送出警告信息给登入用户。</span><br><span class="line">reboot： reboot： 重开机。</span><br><span class="line">reboot -w： 做个重开机的模拟（只有纪录并不会真的重开机）。</span><br></pre></td></tr></table></figure>
          
        
      
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<p>Centos安装wget文件下载</p>
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<h4 id="安装"><a href="#安装" class="headerlink" title="安装"></a>安装</h4><p>CentOS wget是一个从网络上自动下载文件的自由工具。它支持HTTP，HTTPS和FTP协议，可以使用HTTP代理. 所谓的自动下载是指，CentOS wget可以在用户退出系统的之后在后台执行。</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">yum install wget</span><br></pre></td></tr></table></figure>
<h4 id="使用技巧"><a href="#使用技巧" class="headerlink" title="使用技巧"></a>使用技巧</h4><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line"># wget -r -np -nd http://example.com/packages/</span><br><span class="line">这条命令可以下载 http:<span class="comment">//example.com 网站上 packages 目录中的所有文件。其中，-np 的作用是不遍历父目录，-nd 表示不在本机重新创建目录结构。</span></span><br><span class="line"> </span><br><span class="line"># wget -r -np -nd --accept=iso http://example.com/centos-5/i386/</span><br><span class="line">与上一条命令相似，但多加了一个 --accept=iso 选项，这指示CentOS wget仅下载 i386 目录中所有扩展名为 iso 的文件。你也可以指定多个扩展名，只需用逗号分隔即可。</span><br><span class="line"> </span><br><span class="line"># wget -i filename.txt</span><br><span class="line">此命令常用于批量下载的情形，把所有需要下载文件的地址放到 filename.txt 中，然后 CentOS wget 就会自动为你下载所有文件了。</span><br><span class="line"> </span><br><span class="line"># wget -c http://example.com/really-big-file.iso</span><br><span class="line">这里所指定的 -c 选项的作用为断点续传。</span><br><span class="line"> </span><br><span class="line"># wget -m -k (-H) http://www.example.com/</span><br><span class="line">该命令可用来镜像一个网站，CentOS wget将对链接进行转换。如果网站中的图像是放在另外的站点，那么可以使用 -H 选项</span><br></pre></td></tr></table></figure>
<p>参考链接：<br><a href="https://www.cnblogs.com/liaojie970/p/5939605.html" target="_blank" rel="noopener">https://www.cnblogs.com/liaojie970/p/5939605.html</a></p>

          
        
      
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<p>解压jdk报错gzipstdinnot in gzip format</p>
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<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line">这个问题是我在配置服务器的java环境时遇到的。</span><br><span class="line"></span><br><span class="line">通过命令: wget http://download.oracle.com/otn-pub/java/jdk/8u144-b01/090f390dda5b47b9b721c7dfaa008135/jdk-8u144-linux-x64.tar.gz</span><br><span class="line"></span><br><span class="line">从oracle官网下载jdk</span><br><span class="line"></span><br><span class="line">然后执行解压命令：tar -zxvfjdk-8u144-linux-x64.tar.gz，却报错：</span><br><span class="line">gzip: stdin: not in gzip format </span><br><span class="line">tar: Child returned status 1 </span><br><span class="line">tar: Error is not recoverable: exiting now</span><br></pre></td></tr></table></figure>
<p>通过file 命令查看，发现jdk-8u144-linux-x64.tar.gz:HTML document text…</p>
<p>解决方法：本地下载好传输上服务器，在解压就没问题了。</p>
<p>Oracle官网下载JDK：<a href="https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html" target="_blank" rel="noopener">传送门</a></p>

          
        
      
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<p>Centos的scp跨机远程拷贝</p>
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<p>实例1：从远处复制文件到本地目录<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$scp root@10.6.159.147:/opt/soft/demo.tar /opt/soft/</span><br></pre></td></tr></table></figure></p>
<p>说明： 从10.6.159.147机器上的/opt/soft/的目录中下载demo.tar 文件到本地/opt/soft/目录中</p>
<p>实例2：从远处复制到本地<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$scp -r root@10.6.159.147:/opt/soft/test /opt/soft/</span><br></pre></td></tr></table></figure></p>
<p>说明： 从10.6.159.147机器上的/opt/soft/中下载test目录到本地的/opt/soft/目录来。</p>
<p>实例3：上传本地文件到远程机器指定目录<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$scp /opt/soft/demo.tar root@10.6.159.147:/opt/soft/scptest</span><br></pre></td></tr></table></figure></p>
<p>说明： 复制本地opt/soft/目录下的文件demo.tar 到远程机器10.6.159.147的opt/soft/scptest目录</p>
<p>实例4：上传本地目录到远程机器指定目录<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$scp -r /opt/soft/test root@10.6.159.147:/opt/soft/scptest</span><br></pre></td></tr></table></figure></p>
<p>说明： 上传本地目录 /opt/soft/test到远程机器10.6.159.147上/opt/soft/scptest的目录中</p>

          
        
      
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<p>Centos安装lrzsz</p>
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<h4 id="安装lrzsz"><a href="#安装lrzsz" class="headerlink" title="安装lrzsz"></a>安装lrzsz</h4><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">yum -y install lrzsz</span><br></pre></td></tr></table></figure>
<h4 id="使用命令"><a href="#使用命令" class="headerlink" title="使用命令"></a>使用命令</h4><p>1.上传文件，执行命令rz，会跳出文件选择窗口，选择好文件，点击确认即可。</p>
<p>rz<br>运行rz命令后弹出选择文件窗口，找到要上传的文件后确认，文件会被上传到Centos当前目录下</p>
<p>2.下载文件，执行命令sz</p>
<p>sz 文件名<br>运行 sz命令后 弹出选择保存路径窗口，点击确认后Centos上的文件会被下载到本地目录下</p>

          
        
      
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                <a class="post-title-link" href="/2019/06/27/Centos7桥接模式设置固定Ip/" itemprop="url">Centos7桥接模式设置固定Ip</a></h1>
        

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            <blockquote>
<p>Centos7桥接模式设置固定Ip</p>
</blockquote>
<p>虚拟机安装Centos7 我这直接安装的带桌面的GNOME，个人学习使用，切换字符界面 int 3，切换回桌面int 5。</p>
<h4 id="操作步骤"><a href="#操作步骤" class="headerlink" title="操作步骤"></a>操作步骤</h4><ul>
<li>1.配置ip地址等信息</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">cd /etc/sysconfig/network-scripts/</span><br><span class="line">编辑 ifcfg-enoXXXXXXX文件</span><br><span class="line"></span><br><span class="line">TYPE=Ethernet # 网络类型为以太网</span><br><span class="line">BOOTPROTO=static # 手动分配ip</span><br><span class="line">DEVICE=eno16777736 # 网卡设备名，设备名一定要跟文件名一致</span><br><span class="line">ONBOOT=yes # 该网卡是否随网络服务启动</span><br><span class="line">IPADDR=192.168.0.200 # 该网卡ip地址</span><br><span class="line">NETMASK=255.255.255.0 # 子网掩码</span><br><span class="line">GATEWAY=192.168.0.1 # 网关</span><br><span class="line">DNS1=8.8.8.8 # DNS，8.8.8.8为Google提供的免费DNS服务器的IP地址</span><br></pre></td></tr></table></figure>
<ul>
<li>2.配置网络工作（可选）</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">在/etc/sysconfig/network文件里增加如下配置</span><br><span class="line"></span><br><span class="line">vim /etc/sysconfig/network</span><br><span class="line"></span><br><span class="line">NETWORKING=yes # 网络是否工作，此处一定不能为no</span><br></pre></td></tr></table></figure>
<ul>
<li>3.配置公共的DNS网关</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">在/etc/resolv.conf文件里增加如下配置</span><br><span class="line"></span><br><span class="line">vim /etc/resolv.conf</span><br><span class="line">nameserver 8.8.8.8</span><br></pre></td></tr></table></figure>
<ul>
<li>4.重启网络服务</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">service network restart</span><br></pre></td></tr></table></figure>
<ul>
<li>5.关闭防火墙</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">systemctl stop firewalld # 临时关闭防火墙</span><br><span class="line">systemctl disable firewalld # 禁止开机启动</span><br></pre></td></tr></table></figure>
<p>问题：重启完成发现ip地址已经设置成功，但是ping baidu.com ping不通。 感觉像DNS的问题，所以我将dns nameserver 改成了网关的ip。</p>
<p>成功的配置:</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br></pre></td><td class="code"><pre><span class="line">第一步配置</span><br><span class="line"></span><br><span class="line">TYPE=&quot;Ethernet&quot;</span><br><span class="line">BOOTPROTO=&quot;static&quot;</span><br><span class="line">DEFROUTE=&quot;yes&quot;</span><br><span class="line">PEERDNS=&quot;yes&quot;</span><br><span class="line">PEERROUTES=&quot;yes&quot;</span><br><span class="line">IPV4_FAILURE_FATAL=&quot;no&quot;</span><br><span class="line">IPV6INIT=&quot;yes&quot;</span><br><span class="line">IPV6_AUTOCONF=&quot;yes&quot;</span><br><span class="line">IPV6_DEFROUTE=&quot;yes&quot;</span><br><span class="line">IPV6_PEERDNS=&quot;yes&quot;</span><br><span class="line">IPV6_PEERROUTES=&quot;yes&quot;</span><br><span class="line">IPV6_FAILURE_FATAL=&quot;no&quot;</span><br><span class="line">NAME=&quot;eno16777736&quot;</span><br><span class="line">UUID=&quot;71a9001c-7d87-4377-863f-de666558ec04&quot;</span><br><span class="line">DEVICE=&quot;eno16777736&quot;</span><br><span class="line">ONBOOT=&quot;yes&quot;</span><br><span class="line">IPADDR=192.168.3.201</span><br><span class="line">NETMASK=255.255.255.0</span><br><span class="line">GATEWAY=192.168.3.1</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">第三步配置</span><br><span class="line"># Generated by NetworkManagern</span><br><span class="line">nameserver 192.168.3.1</span><br></pre></td></tr></table></figure>
          
        
      
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            <blockquote>
<p>Centos安装配置JDK环境</p>
</blockquote>
<h4 id="操作步骤"><a href="#操作步骤" class="headerlink" title="操作步骤"></a>操作步骤</h4><ul>
<li>1、检查系统是否有自带jdk并卸载</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line">rpm -qa | grep java</span><br><span class="line">显示如下信息(示例:每个人不一样视自己的为准)：</span><br><span class="line">java-1.4.2-gcj-compat-1.4.2.0-40jpp.115</span><br><span class="line">java-1.6.0-openjdk-1.6.0.0-1.7.b09.el5</span><br><span class="line"></span><br><span class="line">卸载：</span><br><span class="line">rpm -e --nodeps java-1.4.2-gcj-compat-1.4.2.0-40jpp.115</span><br><span class="line">rpm -e --nodeps java-1.6.0-openjdk-1.6.0.0-1.7.b09.el5</span><br></pre></td></tr></table></figure>
<ul>
<li>2、上传jdk-8u151-linux-x64.tar.gz，在/usr/目录下创建java目录进入该目录，解压该文件</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line">mkdir/usr/java</span><br><span class="line">cd /usr/java</span><br><span class="line">tar -zxvf jdk-8u151-linux-x64.tar.gz</span><br><span class="line"></span><br><span class="line">官网下载：https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html</span><br><span class="line">百度云下载：</span><br><span class="line">链接: https://pan.baidu.com/s/1qXU6vmc 密码: qfqn</span><br></pre></td></tr></table></figure>
<ul>
<li>3、设置环境变量&amp;加载资源</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line">vi /etc/profile</span><br><span class="line"></span><br><span class="line">按下esc+i 进行输入</span><br><span class="line">添加如下内容：</span><br><span class="line"></span><br><span class="line">#set java environment</span><br><span class="line">JAVA_HOME=/usr/java/jdk1.8.0_151</span><br><span class="line">JRE_HOME=/usr/java/jdk1.8.0_151/jre</span><br><span class="line">CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib</span><br><span class="line">PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin</span><br><span class="line">export JAVA_HOME JRE_HOME CLASS_PATH PATH</span><br><span class="line"></span><br><span class="line">按下esc+:wq 进行保存</span><br><span class="line"></span><br><span class="line">source /etc/profile</span><br></pre></td></tr></table></figure>
<ul>
<li>4、测试</li>
</ul>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">java -version</span><br><span class="line"></span><br><span class="line">输出</span><br><span class="line">java version &quot;1.8.0_151&quot;</span><br><span class="line">Java(TM) SE Runtime Environment (build 1.8.0_151-b12)</span><br><span class="line">Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode)</span><br></pre></td></tr></table></figure>
<p>安装成功！</p>

          
        
      
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  <script type="text/javascript">
    // Popup Window;
    var isfetched = false;
    var isXml = true;
    // Search DB path;
    var search_path = "search.xml";
    if (search_path.length === 0) {
      search_path = "search.xml";
    } else if (/json$/i.test(search_path)) {
      isXml = false;
    }
    var path = "/" + search_path;
    // monitor main search box;

    var onPopupClose = function (e) {
      $('.popup').hide();
      $('#local-search-input').val('');
      $('.search-result-list').remove();
      $('#no-result').remove();
      $(".local-search-pop-overlay").remove();
      $('body').css('overflow', '');
    }

    function proceedsearch() {
      $("body")
        .append('<div class="search-popup-overlay local-search-pop-overlay"></div>')
        .css('overflow', 'hidden');
      $('.search-popup-overlay').click(onPopupClose);
      $('.popup').toggle();
      var $localSearchInput = $('#local-search-input');
      $localSearchInput.attr("autocapitalize", "none");
      $localSearchInput.attr("autocorrect", "off");
      $localSearchInput.focus();
    }

    // search function;
    var searchFunc = function(path, search_id, content_id) {
      'use strict';

      // start loading animation
      $("body")
        .append('<div class="search-popup-overlay local-search-pop-overlay">' +
          '<div id="search-loading-icon">' +
          '<i class="fa fa-spinner fa-pulse fa-5x fa-fw"></i>' +
          '</div>' +
          '</div>')
        .css('overflow', 'hidden');
      $("#search-loading-icon").css('margin', '20% auto 0 auto').css('text-align', 'center');

      $.ajax({
        url: path,
        dataType: isXml ? "xml" : "json",
        async: true,
        success: function(res) {
          // get the contents from search data
          isfetched = true;
          $('.popup').detach().appendTo('.header-inner');
          var datas = isXml ? $("entry", res).map(function() {
            return {
              title: $("title", this).text(),
              content: $("content",this).text(),
              url: $("url" , this).text()
            };
          }).get() : res;
          var input = document.getElementById(search_id);
          var resultContent = document.getElementById(content_id);
          var inputEventFunction = function() {
            var searchText = input.value.trim().toLowerCase();
            var keywords = searchText.split(/[\s\-]+/);
            if (keywords.length > 1) {
              keywords.push(searchText);
            }
            var resultItems = [];
            if (searchText.length > 0) {
              // perform local searching
              datas.forEach(function(data) {
                var isMatch = false;
                var hitCount = 0;
                var searchTextCount = 0;
                var title = data.title.trim();
                var titleInLowerCase = title.toLowerCase();
                var content = data.content.trim().replace(/<[^>]+>/g,"");
                var contentInLowerCase = content.toLowerCase();
                var articleUrl = decodeURIComponent(data.url);
                var indexOfTitle = [];
                var indexOfContent = [];
                // only match articles with not empty titles
                if(title != '') {
                  keywords.forEach(function(keyword) {
                    function getIndexByWord(word, text, caseSensitive) {
                      var wordLen = word.length;
                      if (wordLen === 0) {
                        return [];
                      }
                      var startPosition = 0, position = [], index = [];
                      if (!caseSensitive) {
                        text = text.toLowerCase();
                        word = word.toLowerCase();
                      }
                      while ((position = text.indexOf(word, startPosition)) > -1) {
                        index.push({position: position, word: word});
                        startPosition = position + wordLen;
                      }
                      return index;
                    }

                    indexOfTitle = indexOfTitle.concat(getIndexByWord(keyword, titleInLowerCase, false));
                    indexOfContent = indexOfContent.concat(getIndexByWord(keyword, contentInLowerCase, false));
                  });
                  if (indexOfTitle.length > 0 || indexOfContent.length > 0) {
                    isMatch = true;
                    hitCount = indexOfTitle.length + indexOfContent.length;
                  }
                }

                // show search results

                if (isMatch) {
                  // sort index by position of keyword

                  [indexOfTitle, indexOfContent].forEach(function (index) {
                    index.sort(function (itemLeft, itemRight) {
                      if (itemRight.position !== itemLeft.position) {
                        return itemRight.position - itemLeft.position;
                      } else {
                        return itemLeft.word.length - itemRight.word.length;
                      }
                    });
                  });

                  // merge hits into slices

                  function mergeIntoSlice(text, start, end, index) {
                    var item = index[index.length - 1];
                    var position = item.position;
                    var word = item.word;
                    var hits = [];
                    var searchTextCountInSlice = 0;
                    while (position + word.length <= end && index.length != 0) {
                      if (word === searchText) {
                        searchTextCountInSlice++;
                      }
                      hits.push({position: position, length: word.length});
                      var wordEnd = position + word.length;

                      // move to next position of hit

                      index.pop();
                      while (index.length != 0) {
                        item = index[index.length - 1];
                        position = item.position;
                        word = item.word;
                        if (wordEnd > position) {
                          index.pop();
                        } else {
                          break;
                        }
                      }
                    }
                    searchTextCount += searchTextCountInSlice;
                    return {
                      hits: hits,
                      start: start,
                      end: end,
                      searchTextCount: searchTextCountInSlice
                    };
                  }

                  var slicesOfTitle = [];
                  if (indexOfTitle.length != 0) {
                    slicesOfTitle.push(mergeIntoSlice(title, 0, title.length, indexOfTitle));
                  }

                  var slicesOfContent = [];
                  while (indexOfContent.length != 0) {
                    var item = indexOfContent[indexOfContent.length - 1];
                    var position = item.position;
                    var word = item.word;
                    // cut out 100 characters
                    var start = position - 20;
                    var end = position + 80;
                    if(start < 0){
                      start = 0;
                    }
                    if (end < position + word.length) {
                      end = position + word.length;
                    }
                    if(end > content.length){
                      end = content.length;
                    }
                    slicesOfContent.push(mergeIntoSlice(content, start, end, indexOfContent));
                  }

                  // sort slices in content by search text's count and hits' count

                  slicesOfContent.sort(function (sliceLeft, sliceRight) {
                    if (sliceLeft.searchTextCount !== sliceRight.searchTextCount) {
                      return sliceRight.searchTextCount - sliceLeft.searchTextCount;
                    } else if (sliceLeft.hits.length !== sliceRight.hits.length) {
                      return sliceRight.hits.length - sliceLeft.hits.length;
                    } else {
                      return sliceLeft.start - sliceRight.start;
                    }
                  });

                  // select top N slices in content

                  var upperBound = parseInt('1');
                  if (upperBound >= 0) {
                    slicesOfContent = slicesOfContent.slice(0, upperBound);
                  }

                  // highlight title and content

                  function highlightKeyword(text, slice) {
                    var result = '';
                    var prevEnd = slice.start;
                    slice.hits.forEach(function (hit) {
                      result += text.substring(prevEnd, hit.position);
                      var end = hit.position + hit.length;
                      result += '<b class="search-keyword">' + text.substring(hit.position, end) + '</b>';
                      prevEnd = end;
                    });
                    result += text.substring(prevEnd, slice.end);
                    return result;
                  }

                  var resultItem = '';

                  if (slicesOfTitle.length != 0) {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + highlightKeyword(title, slicesOfTitle[0]) + "</a>";
                  } else {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + title + "</a>";
                  }

                  slicesOfContent.forEach(function (slice) {
                    resultItem += "<a href='" + articleUrl + "'>" +
                      "<p class=\"search-result\">" + highlightKeyword(content, slice) +
                      "...</p>" + "</a>";
                  });

                  resultItem += "</li>";
                  resultItems.push({
                    item: resultItem,
                    searchTextCount: searchTextCount,
                    hitCount: hitCount,
                    id: resultItems.length
                  });
                }
              })
            };
            if (keywords.length === 1 && keywords[0] === "") {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-search fa-5x" /></div>'
            } else if (resultItems.length === 0) {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-frown-o fa-5x" /></div>'
            } else {
              resultItems.sort(function (resultLeft, resultRight) {
                if (resultLeft.searchTextCount !== resultRight.searchTextCount) {
                  return resultRight.searchTextCount - resultLeft.searchTextCount;
                } else if (resultLeft.hitCount !== resultRight.hitCount) {
                  return resultRight.hitCount - resultLeft.hitCount;
                } else {
                  return resultRight.id - resultLeft.id;
                }
              });
              var searchResultList = '<ul class=\"search-result-list\">';
              resultItems.forEach(function (result) {
                searchResultList += result.item;
              })
              searchResultList += "</ul>";
              resultContent.innerHTML = searchResultList;
            }
          }

          if ('auto' === 'auto') {
            input.addEventListener('input', inputEventFunction);
          } else {
            $('.search-icon').click(inputEventFunction);
            input.addEventListener('keypress', function (event) {
              if (event.keyCode === 13) {
                inputEventFunction();
              }
            });
          }

          // remove loading animation
          $(".local-search-pop-overlay").remove();
          $('body').css('overflow', '');

          proceedsearch();
        }
      });
    }

    // handle and trigger popup window;
    $('.popup-trigger').click(function(e) {
      e.stopPropagation();
      if (isfetched === false) {
        searchFunc(path, 'local-search-input', 'local-search-result');
      } else {
        proceedsearch();
      };
    });

    $('.popup-btn-close').click(onPopupClose);
    $('.popup').click(function(e){
      e.stopPropagation();
    });
    $(document).on('keyup', function (event) {
      var shouldDismissSearchPopup = event.which === 27 &&
        $('.search-popup').is(':visible');
      if (shouldDismissSearchPopup) {
        onPopupClose();
      }
    });
  </script>





  

  

  
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